Roller ball for conveyance



FIG. 1 is a front, right, top perspective view of a roller ball forconveyance, showing my new design;

FIG. 2 is a front elevational view thereof, the rear elevational viewbeing the same;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side elevational view thereof, the left sideelevational view being the same; and,

FIG. 6 is an enlarged cross-sectional view taken along line 6-6 in FIG.3.

The dashed broken lines show portions of the roller ball for conveyancethat form no part of the claimed design. The dot-dash broken linesdefine the bounds of the claimed design and form no part thereof.

CLAIM I claim the ornamental design for a roller ball for conveyance, asshown and described.